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From "Ashu Pachauri (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17057) Minor compactions should also drop page cache behind reads
Date Tue, 29 Nov 2016 00:46:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17057?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15703718#comment-15703718
] 

Ashu Pachauri commented on HBASE-17057:
---------------------------------------

Picking this up.

> Minor compactions should also drop page cache behind reads
> ----------------------------------------------------------
>
>                 Key: HBASE-17057
>                 URL: https://issues.apache.org/jira/browse/HBASE-17057
>             Project: HBase
>          Issue Type: Improvement
>          Components: Compaction
>            Reporter: Ashu Pachauri
>            Assignee: Ashu Pachauri
>
> Long compactions currently drop cache behind reads so that they don't pollute the page
cache but short compactions don't do that. The bulk of the data is actually read during minor
compactions instead of major compactions,  and thrashes the page cache since it's mostly not
needed. 
> We should drop page cache behind reads for minor compactions too. 



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